<template>
  <div class="top-category">
    <div class="container">
      <!-- 面包屑 -->

      <XtxBrand>
        <XtxBrandItem to="/">首页</XtxBrandItem>
        <transition name="fade-right"  mode="out-in">
          <XtxBrandItem :key="topCategory.id">{{topCategory.name}}</XtxBrandItem>
        </transition>
      </XtxBrand>

      <!-- /面包屑 -->
      <!-- 轮播图 -->
     <xtx-carousel :sliders="sliders" style="height:500px;" autoPlay class="pannel"></xtx-carousel>
      <!-- /轮播图 -->
      <!-- 全部分类 -->
      <div class="all" ref="box">
        <div class="sub-list">
        <h3>全部分类</h3>
        <ul>
          <li  v-for="item in topCategory.children" :key="item.id" >
            <a href="javascript:;">
              <img :src="item.picture" >
              <p>{{item.name}}</p>
            </a>
          </li>
        </ul>
      </div>
      </div>
      <!-- /全部分类 -->
      <!-- 各个分类推荐商品 -->
       <div class="ref-goods" v-for="newitem in list" :key="newitem.id">
        <div class="head">
          <h3>-{{newitem.name}}-</h3>
          <p class="tag">温暖柔软,品质之选</p>
          <XtxMore :path="`/category/sub/${newitem.id}`" />
        </div>
        <div class="body">
          <GoodsItem v-for="sub in newitem.goods" :key="sub.id" :sub="sub" />
        </div>
      </div>
      <!-- /各个分类推荐商品 -->
    </div>
  </div>
</template>

<script>
import { findBanner } from '@/api/home'
import { computed, ref, watch } from 'vue'
// import { useLayzyData } from '@/hooks'
import { useStore } from 'vuex'
import { useRoute } from 'vue-router'
import GoodsItem from './components/goods-item.vue'
import XtxMore from '@/components/libaray/xtx-more.vue'
import { findFirst } from '@/api/category'
export default {
  name: 'TopCategory',
  components: {
    GoodsItem,
    XtxMore
  },
  setup () {
    // 轮播图
    const sliders = ref([])
    findBanner().then(data => {
      sliders.value = data.result
    })

    // const box = ref(null)
    // const Alllist = useLayzyData(box, findAllProduct)
    // 面包屑+全部分类
    const store = useStore()
    const route = useRoute()
    const topCategory = computed(() => {
    // 当前顶级分类 === 根据路由上的id区vuex中category模块list中查找
      let cate = {}
      const item = store.state.category.list.find(item => item.id === route.params.id)
      if (item) {
        cate = item
      }
      return cate
    }
    )
    // 一级商品类目
    const list = ref([])
    const getSublist = () => {
      findFirst(route.params.id).then(data => {
        list.value = data.result.children
      })
    }
    watch(() => route.params.id, (newVal) => {
      // newVal && getSublist()
      // 在顶级类目下才发请求
      if (newVal && `/category/${newVal}` === route.path) getSublist()
    }, { immediate: true })

    return { sliders, topCategory, list }
  }

}
</script>

<style scoped lang="less">
.top-category {
  .pannel {
    .hoverShadow();
  }
  .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;
    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }
      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }
    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }.sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        .hoverShadow();
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
}
</style>
